irconflict Posted March 18, 2014 Share Posted March 18, 2014 I recently bought an 08 spec b that came with a turbo back exhaust. Yesterday while driving home from school my car threw the p2096 code. Which I understand is from running lean. I also understand that one reason it may throw this code is because the rear 02 sensor being bad. I also found out my car is not tuned for the downpipe and I am getting it tuned ASAP. I am aware of what can happen without the tune. My real question is can that code be from me over boosting and then running lean as a result? If so then my problem should be rectified with a tune correct? Thanks for any help. Link to comment Share on other sites More sharing options...
RWebb Posted March 18, 2014 Share Posted March 18, 2014 Did you over boost? Catted or catless downpipe? A tune should help. Link to comment Share on other sites More sharing options...
irconflict Posted March 18, 2014 Author Share Posted March 18, 2014 Catted downpipe. Honestly I'm not sure if I over boosted or not. Link to comment Share on other sites More sharing options...
RWebb Posted March 18, 2014 Share Posted March 18, 2014 Catted downpipe. Honestly I'm not sure if I over boosted or not. It feels like hitting a brick wall. The car falls flat on its face and you have that look like its a mess. Trust me if it happens you would know. How many miles on the car? Link to comment Share on other sites More sharing options...
irconflict Posted March 18, 2014 Author Share Posted March 18, 2014 ok non of that happened so I didn't overboost. When it happened I was on the highway and it appeared. The car has 78xxx miles. Link to comment Share on other sites More sharing options...
ERLoft Posted March 18, 2014 Share Posted March 18, 2014 I had this code when a crack in the weld appeared at my aftermarket catalytic converter in the downpipe. Outside air was getting in, showing a lean condition to the rear O2 sensor that didn't really exist. Got it welded up at JBA Speed Shop here in San Diego and the problem never recurred. Before it was fixed, the code was generally one that would appear at cruising speed on the highway, so you might want to check for any exhaust leaks between the turbo and rear O2 sensor. 2013 █S4 - Glacier White - DSG - B&O - Tech Package - Sports Diff - Napa - RS4 Grille - Stasis Exhaust - APR Intake - KW Variant 1 - Stern Control Arms - CR-15 - Stasis RSB - Moog Endlinks - PC Hyper Black Peelers - Deval Front Lip - ECS Rear Diffuser - Carbon Imports Ducktail - ECS Mirror Caps - Relak Paddle Extensions - Autostyle Floor Mats - LED Interior - V1 - Blackvue DR900s - [sIGPIC][/sIGPIC] Link to comment Share on other sites More sharing options...
irconflict Posted March 18, 2014 Author Share Posted March 18, 2014 I had this code when a crack in the weld appeared at my aftermarket catalytic converter in the downpipe. Outside air was getting in, showing a lean condition to the rear O2 sensor that didn't really exist. Got it welded up at JBA Speed Shop here in San Diego and the problem never recurred. Before it was fixed, the code was generally one that would appear at cruising speed on the highway, so you might want to check for any exhaust leaks between the turbo and rear O2 sensor. Ok thanks I will check for leaks tomorrow. Ifs that's the case I can get it welded up. Link to comment Share on other sites More sharing options...
irconflict Posted March 18, 2014 Author Share Posted March 18, 2014 Also is it safe to drive it with this code till I get it fixed? Link to comment Share on other sites More sharing options...
ERLoft Posted March 19, 2014 Share Posted March 19, 2014 I'd say that the ECU may see that lean condition and try to add fuel to compensate, so you may run rich until you get it figured out. Better rich than lean though. 2013 █S4 - Glacier White - DSG - B&O - Tech Package - Sports Diff - Napa - RS4 Grille - Stasis Exhaust - APR Intake - KW Variant 1 - Stern Control Arms - CR-15 - Stasis RSB - Moog Endlinks - PC Hyper Black Peelers - Deval Front Lip - ECS Rear Diffuser - Carbon Imports Ducktail - ECS Mirror Caps - Relak Paddle Extensions - Autostyle Floor Mats - LED Interior - V1 - Blackvue DR900s - [sIGPIC][/sIGPIC] Link to comment Share on other sites More sharing options...
Max Capacity Posted March 19, 2014 Share Posted March 19, 2014 P2096 - Post Catalyst Fuel Trim System Too Lean Bank 1 That's the front O2 sensor. Get a OEM one, my aftermarket one lasted 2 years. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
RWebb Posted March 19, 2014 Share Posted March 19, 2014 P2096 - Post Catalyst Fuel Trim System Too Lean Bank 1 That's the front O2 sensor. Get a OEM one, my aftermarket one lasted 2 years. And I wouldn't drive much/ hard with it not working. Link to comment Share on other sites More sharing options...
Max Capacity Posted March 19, 2014 Share Posted March 19, 2014 Yes, the front one is what helps to meter the fuel flow. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
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